:root {
  --bg: #0b0d12;
  --surface: #141821;
  --surface-2: #1c212d;
  --border: #2a3040;
  --text: #e6e9ef;
  --text-dim: #8a93a6;
  --accent: #5eead4;
  --accent-dim: #0d9488;
  --danger: #f87171;
  --warn: #fbbf24;
  --good: #4ade80;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}

body {
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom) 0;
}

.container {
  max-width: 560px;
  margin: 0 auto;
  padding: 16px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 4px 20px;
}

.topbar h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
  color: var(--text);
}

.topbar .user-chip {
  font-size: 13px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar button.ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 14px;
}

.panel h2 {
  margin: 0 0 12px 0;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-dim);
}

.elapsed-big {
  font-size: 40px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  line-height: 1.1;
}

.elapsed-sub {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 6px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.stat {
  background: var(--surface-2);
  border-radius: 10px;
  padding: 12px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.stat-value {
  font-size: 22px;
  font-weight: 600;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.stat-value.good { color: var(--good); }
.stat-value.warn { color: var(--warn); }

.log-button {
  width: 100%;
  padding: 22px;
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, #f97316, #ef4444);
  color: white;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  letter-spacing: 0.5px;
  box-shadow: 0 8px 24px -8px rgba(239, 68, 68, 0.5);
  transition: transform 0.1s, box-shadow 0.2s;
}
.log-button:active { transform: scale(0.98); }
.log-button.confirming {
  background: linear-gradient(135deg, #dc2626, #991b1b);
}

.log-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.log-actions button {
  flex: 1;
  background: var(--surface-2);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-size: 13px;
  cursor: pointer;
}
.log-actions button:hover { color: var(--text); }

.range-tabs {
  display: flex;
  gap: 4px;
  background: var(--surface-2);
  padding: 4px;
  border-radius: 10px;
  margin-bottom: 14px;
}
.range-tabs button {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 8px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}
.range-tabs button.active {
  background: var(--surface);
  color: var(--text);
}

.chart-wrap {
  position: relative;
  height: 240px;
}

.entries {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 320px;
  overflow-y: auto;
}
.entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.entry:last-child { border-bottom: none; }
.entry .time { color: var(--text); }
.entry .note { color: var(--text-dim); font-size: 12px; margin-top: 2px; }
.entry .delete {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 16px;
}
.entry .delete:hover { color: var(--danger); }

.empty {
  text-align: center;
  color: var(--text-dim);
  padding: 30px 0;
  font-size: 14px;
}

/* Auth pages */
.auth-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 100%;
  max-width: 380px;
}
.auth-card h1 {
  font-size: 22px;
  margin: 0 0 4px 0;
}
.auth-card .sub {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 22px;
}
.field {
  margin-bottom: 14px;
}
.field label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}
.field input, .field select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px;
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--accent-dim);
}
.btn-primary {
  width: 100%;
  background: var(--accent-dim);
  color: var(--text);
  border: none;
  padding: 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent); color: #0b0d12; }
.toggle-link {
  text-align: center;
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-dim);
}
.toggle-link a { color: var(--accent); text-decoration: none; cursor: pointer; }
.error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 14px;
  display: none;
}
.error.show { display: block; }

/* Modal for backdated entry / note */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 100;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  width: 100%;
  max-width: 380px;
}
.modal h3 { margin: 0 0 14px 0; font-size: 16px; }
.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}
.modal-actions button { flex: 1; }
.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  z-index: 200;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.toast.show { opacity: 1; }